Telegraphy.



F. B. DELANY. TBLEGRAPHY.

APPLICATION FILED DEG. 28 1908.

l 1 24,598. Patented .Ia11.12,1915.

3 SHEETS-SHEET 1.

P. B. DELANY.

TELEGBAPHY.

APPLICATION FILED DEG. 28, '1908.

Patented Jau. 12, 1915.

3 SHEETS-SHEET 2.

P. B. DBLNY.

TELEGRAPHY.

APPLICATION hun DLC.2R.1|U.,:,

Patented Jan. 12, 1915,

S SHEETS-SHEET SA @mir-fuman: fgmw positionv -orovided stations l and lY are to 'receive the same message. With key l at station X closed and the negative battery .switch of battery B also closed, the circuit liwill be as follows; from armature of polar- Lized relay R switch s of transmitter T, Wire y, contact a of switch S, Wire cu2, neutral relay N, Wire we to line L and polarized relayR2 at station I, wire n, contact o of switch S', wire fw, switch s?- of transmitter T', Wire w, key K, wire wT to line L, polarizedv relay R4 at Y, Wire w12, contact b2 of switch S2, wire fwg, switch s of transmitter T2, Wire w10, switch e of receiver A2 and to earth when the receiver lever is pushed forward.

At both stations, and Y, the operation of receiving from reverse currents is as follows: The lever of recorder A having been moved forward so as to put the chemically moistened tape in motionnnd to bring the recording Wire down upon it, the arrivingV signals actu-ate polarized relay R2 causing .its armature to close circuit of battery u through adjustable resistance r', recording Wire t, chemical tape, wire w15, contact d2 of switch S and wire w15 back to the arxnature of R2. The inductance i is shownin 'shunt around the armature and contacts or rthe relay R2. Signals sent by reverse vcurrents from 7 to X would perform the saine Work. at l and X in the same Way, as just described.

lt would be inconvenient and expensive to provide transmitting currents at way stations. lt is practicable by this system to insert an automatic transmitter in place of the Morse liley and operate the neutral or single current relays which, under this lcondition, are made, in place of the polarized rclaysto control the yrecording of signals electro-chemically. ln this ease the switc S at l and the switch S at X, for instance,

if that is the only station to be reached, are turned to the third position. rlhe lever of transmitter il" yis rnoved :forward allowing contacts o to press onl the perforated tape and through the perforations polarized relay R5 is operated Ito makeand break the main circuit through Wire 107 to main line toward station Y; and from switch 82 by wire zo to Contact a', wire w* and neutral relay N to line toward station X., at whichl latter station the line is. connected to'neutral relay N, thence by wire w2 to contact c of switch S and by wire y to switch s of' transmitter T, then by wire rw to switch 3 of recorder A, and thence to ground. Neutral relay N is now in control or" the chemical recording circuit through wire w20, contact c of switch S, Wire 'w21 to chemical tane and recording linger t, Wire zo through aidlustable resistance r to recording battery a,

maltese t tomatic by turning the controlling" switches at the stations communicating.

l claim:

l. ln telegraphy, the combination of a main line, an automatic transmitter, a local circuit, a polarized relay in said local circuit operated by said automatic transmitter,

means controlled by said polarized relay Afor sending signal impulses into said line, a neutral receiving relay connected in said, line, a local circuit, a chemical recorder in said local circuit, and means controlled by said vrelay for recording signals by said chemical recorder.

2. In telegraphy, the combination of a. main line, an automatic transmitter, a local circuit, a. polarized relay'in said local circuit-operated by said automatic transmitter, means controlled'by said polarized relay'or sending; signal impulses into said line, a neutral relay normally'ccnnected in said line, a local recorder, a local circuit for recording controlled by said neutral relay, a polarized relay also controlling said recording circuit and means for connecting said polarized relay to said main line.

3. ln telegraphy, the combination of a recording circuit, a polarized relay controlling said circuit, a neutral relay also controli ling said circuit. and a sounder circuit/@lso controlled by said neutral relay.

el. In .'telegranhy, the combination of a line, an automatic transmitter, a polarized relay controlled by said automatic transmitter, means .controlled by said polarized relay for sending signal impulses oia single polarity intosaid main line, 4means also controlled by said polarized relay for sending signal impulses of reverse polarity into said line, and means at a receiving station for locally recording said single and reverse polaritysignals by the same recorder.

5. In telegraphy a local chemical recording circuit, means for recording by currents of one polarity, and meansl for sending currents of opposite polarity over said circuit for prevention 'of marks by local chemical action.

'In testimony whereof, l' have hereunto subscribed my naine.

PATRICK B. DELANY.

Witnesses L. F. BROWMNG, E. F. Wiens.. 

